#!/bin/sh
#
# Copyright (C) 2013, 2016, 2018  Etersoft
# Copyright (C) 2013, 2016, 2018  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

# TODO: will it has local only mode?

load_helper epm-print

epm_whatdepends()
{
    local CMD
    [ -n "$pkg_files" ] && fatal "whatdepends does not handle files"
    [ -n "$pkg_names" ] || fatal "whatdepends: package name is missed"
    local pkg=$(print_name $pkg_names)

# by package name
case $PMTYPE in
    apt-rpm)
        if [ -z "$verbose" ] ; then
            showcmd apt-cache whatdepends $pkg
            if [ -n "$short" ] ; then
# TODO: use common converter from full name to short name
# TODO: see print_pkgname
                a= apt-cache whatdepends $pkg | grep "^  [^ ]" | sed -e "s|[0-9]*:||" | grep -E -v "(i586-|-debuginfo)" | sed -e 's|[@:].*||' -e "s|-[0-9].*||g" -e 's|^ *||' -e 's/\.32bit//g'
            else
                load_helper epm-query
                a= apt-cache whatdepends $pkg | grep "^  [^ ]" | sed -e "s|[0-9]*:||" | grep -E -v "(i586-|-debuginfo)"
            fi
            return
        fi
        CMD="apt-cache whatdepends"
        ;;
    apt-dpkg|aptitude-dpkg)
        CMD="apt-cache rdepends"
        ;;
    aptitude-dpkg)
        CMD="aptitude why"
        ;;
    packagekit)
        CMD="pkcon depends-on"
        ;;
    yum-rpm)
        CMD="repoquery --whatrequires"
        ;;
    urpm-rpm)
        CMD="urpmq --whatrequires"
        ;;
    dnf-rpm)
        # check command: dnf repoquery --whatrequires
        CMD="repoquery --whatrequires"
        ;;
    emerge)
        assure_exists equery
        CMD="equery depends -a"
        ;;
    homebrew)
        CMD="brew uses"
        ;;
    pkgng)
        CMD="pkg info -r"
        ;;
    aptcyg)
        CMD="apt-cyg rdepends"
        ;;
    opkg)
        CMD="opkg whatdepends"
        ;;
    eopkg)
        showcmd eopkg info $pkg
        # eopkg info prints it only from repo info
        LC_ALL=C eopkg info $pkg | grep "^Reverse Dependencies" | sed -e "s|Reverse Dependencies[[:space:]]*: ||" | grep -v "^$"
        return
        ;;
    xbps)
        CMD="xbps-query -X"
        ;;
    *)
        fatal "Have no suitable command for $PMTYPE"
        ;;
esac

docmd $CMD $pkg

}
